I bought my TL new in early 2005 and it has been dealer serviced with 110,000 kms at the moment.
I have had nothing to service of significance except a new battery and a front brake job.
I have regularly treated the leather and it still looks like new.
The best tires I have found for the vehicle are Continental Extreme Contacts.
Unfortunately my in-dash cd player stopped working last year and I had Future Shop connect an ipod cable to the system for running my music in the car on trips.
I have had 4 acuras in my family (2 TLs and 2 Integras) and they have all been trouble free.
They are indeed well designed and well built vehicles.